Tanzania time is GMT/UTC plus three hours. There is no daylight saving.
Tanzanians use the Swahili system of telling time, in which the first hour is saa moja (asubuhi), corresponding with 7am. Counting begins again with saa moja (jioni), the first hour, evening, corresponding with 7pm. Although most will switch to the international clock when speaking English with foreigners, confusion sometimes occurs, so ask people to confirm whether they are using saa za kizungu (international time) or saa za kiswahili (Swahili time). Signboards with opening hours are often posted in Swahili time.